9981964 has 12 divisors (see below), whose sum is σ = 17492944. Its totient is φ = 4983984.

The previous prime is 9981943. The next prime is 9982051. The reversal of 9981964 is 4691899.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2737 + ... + 5239.

Almost surely, 2^9981964 is an apocalyptic number.

It is an amenable number.

9981964 is a deficient number, since it is larger than the sum of its proper divisors (7510980).

9981964 is a wasteful number, since it uses less digits than its factorization.

9981964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504 (or 3502 counting only the distinct ones).

The product of its digits is 139968, while the sum is 46.

The square root of 9981964 is about 3159.4246311631. The cubic root of 9981964 is about 215.3138664413.

The spelling of 9981964 in words is "nine million, nine hundred eighty-one thousand, nine hundred sixty-four".